People seem to be a little overly pessimistic about the situation. Like I FEEL SO BAD FOR YOU! YOU'RE GONNA FAAAAAAIL (a little bit exaggerated).
No, being able to include paragraphs doesn't take away 10 marks from your exam. I would think 2 at the most, if not 1. Being able to write paragraphs does not equate to being a good writer. The examiner is much more concerned about content - your thinking process. If you forgot to include paragraphs in the language exam then they would care more, but for God's sake, this is the literature exam and they want to see how well you can interpret the novel and think critically about important aspects of it.
I'm really surprised by some of these comments. People are like "I want to be honest with you, but this is seriously gonna kill your grade. Don't expect a good grade". Don't expect a good grade? WTF? You can expect an A* if you wrote a good essay. The examiner is not gonna be like "oh my gawwddd! He didn't include paragraphs! How can someone be so stupid! Even though he got an A* according to the mark scheme, I'm just gonna lower his grade a bit". Forgetting to include paragraphs is common under the pressure of examinations, and the examiners realize that.